We have calculated the absorption of H \(\alpha \)  (Equation ()) for a grid of accretion rates \(\dot{M} \)  and masses \(M_{\mathrm {p}}\) 
for the different accretion geometries
discussed in Section REF : a spherically symmetric inflow (SpherAcc), accretion onto the polar regions (Polar), and magnetospheric accretion (MagAcc). They are illustrated in Figure REF  and summarised in Table REF .
In each case we take the emerging flux from the [1]} models and integrate the extinction along a radial radiative path starting at the shock and going out to \({r_{\rm max}}\) . The density and temperature are as shown in Figure REF  for one geometry.
